If all you need is something to draw on, get a wacom tablet and hook it up to a laptop. Wacom drivers are in the linux kernel.
In college I've been taking notes on a screenless drawing tablet, its not too bad taking out a laptop and plugging it in. It doesn't take up much space on my desk if I put the tablet on my keyboard.
Alternatively, you may also be able to get a microsoft surface laptop working on linux
Yeah I haven't bought a tablet in years, just been using the same one as I started with